Locomotive valve-gear.



W. S. BROWN. LOCQMOTIVE VALVE GEAR. APPLIQ'ATION FILED mm: 19, 1914.

1,1 14,728; Patenud Oct. 27, 1914,

2 SHEETS-SHEET 1.

Q Y. 10 3 2? 4,23 13 I I -|ml g 9'" g mmlmmmr 15%? r will U MM? I awuamtoz wil ueooao I 'w. s. BROWN. VLOGOMOTIVE vAL'vB GEAR. APPLICATION FILED JUNE 19, 1914.

1,1 14,728. Patentedbct. 27, 1914.

UNITED STATES PATENT OFFICE.

WILLIAM SHERMAN BROWN, 0F KNOXVILLE, TENNESSEE.

LOCOMOTIVE VALVE-GEAR.

To all whom it may concern:

Be it known that I, \VILLIAM' SHERMAN BROWN, a citizen of the United States, residing at Knoxville, in the county of Knox and State of Tennessee, have invented a new and useful Improvement in Locomotive Valve-Gear, of which the following is a specification, reference being had to the accompanying drawing.

My improvement relates particularly to mechanism for transmitting motion from the crank of a drive wheel of a steam locomotive to the distributing valve which admits steam to the cylinder.

The object of the improvement is to pro- Vide a construction which is adapted to economical n'ianufacture and maintenance and which produces accurate valve movement.

For analogous gears, reference is here made to my United States Patents No. 1,033,532, granted July 23, 1912, and No. 1,076,406, granted October Q1, 1913. Said patents disclose a valve gear in which there is a member having a curved slot in which is a slide block forming; a portion of the reversing mechanism. In the improvement to be herein described. there is a reversing mechanism slide block which has a straight horizontal path. In the structure of said two patents, the slide block constitutes a support which is movable in an arc and forms a part of the reversing mechanism. The slide block of the present improvement does not constitute such a support: but there is associated therewith and *arried thereby another member which bears such a support and is movable in an arc and forms a part of the reversing mechanism.

In the accompanying drawings, Figure 1 is a side elevation, portions being broken away, showing my improvement applied to one side of a locomotive, the slide block being near the forward end of its path; Fig. 2 is a plan of a portion of the mechanism shown in Fig. 1; Fig. 3 is a soon on the line, 3-3, of Fig. 1. looking toward the right; Fig. 4 is a section on the line, 44. of Fig. 1, looking to the right; Fig. 5 is a plan of a bridge; Fig. 6 is a side elevation of said bridge; Fig. 7 is a section on the line, 77, of Fig. 1, looking toward the right; Fig. 8 is a side elevation showing Specification of Letters Patent.

Application filed June 19. 1914.

l l l l Patented Oct. 27, 1914.

Serial No. 846,128.

another form of the reversing mechanism; Fig. 9 is a section on the line, 99, of Fig. 8. the lower end of an upright link being added.

Referring to said drawings. 1 is the usual valve stem extending to the distributing valve (not shown). The usual horizontal, parallel cross-head guide bars, 2, are supported at the rear ends by the guide-yoke extension. 3. The usual connecting rod or pitman. 4, is coupled to the usual main crank, 5, carried by a drive wheel, D. ()n the main crank rigidly mounted an auxiliary crank, U, standing ninety degrees forward of the main crank.

bridge. B, is located above the frame, A. and extends from the ordinary guideyoke. 8, and guide-yoke extension, 3, to the cross-beam or plate. 10, and is secured to said guide-yoke and to said cross-beam by means of bolts, 9. Said bridge is in the form of a plate having its length horizontal and being turned to bring its long edges into an upright plane. At its rear end, the bridge has a lateral extension, 11. resting against the cross-beam, 10, and receiving said bolts, 9.- At its forward end the bridge has a transverse extension, 12, reaching from both sides of the body of the bridge and resting against the guide-yoke, S, and the guide yoke extension, 3, and receiving said bolts, t). The innermost of said bolts extend through'the transverse extension, 12, and the guide voke, 8, while the other of said bolts extend through said member and through the guide-yoke, 8, and the guide-yoke extension, 3. ()n the outer portion of the trans-- verse member. 12, and integral therewith, is an car. 13, which is directed rearward; and on the innermost portion of said transverse member is another ear, 1%, also directed rearward and located horizontally opposite the car. 13. Each of said cars has a bearing,

J-l. r h imp; the ends of a shaft, 16. on said rotatable on said shaft, the latter b ing held immovably in its bearings. in said bridge are two upright holes, 20, each of which receives a bolt, 21, which extends through the ends of two bars or plates, 22 and 23, the .iolcs. 20. being large enough to permit some lateral adjustment of "ellwrank or rocking member, F,

said bolts. The lower of said plates rests upon the upper face of said bridge and has from the lower plate. The lateral faces of said plates are flush with the lateral faces of the bridge. The opposing faces of said plates are straight and horizontal, and between said faces is located the slide block, 25, said block being as wide as said plates, so that the lateral faces of said plates and said block are flush with each other. The 'upper portion of a forked rocking member, 26, extends to each side of said plates and said block, and a bolt or pintle, 27, extends horizontally through the arms of said rocking member and through the slide block. By this means the said block and said forked rocking nember are secured to each other so that said block, pintle, and the adjacent portion of said rocking member must travel in unison. The arms of the rocking member, 26, keep the slide-block in place between the slideway plates.

Rearward of the rear bolt, 21, are two rigid brackets, 28, extending downward. Said brackets arelocated opposite each other and receive between them the rear end of a horizontal link, 29. A bolt, 30, extends through said brackets and said link and couples the latter so as to allow its forward end to move up and down. The forward,

end of the link, 29, extends between the lower arms of the forked member, 26, and is coupled to said arms by means of a bolt, 31, extending horizontally through said forked member and said link at a point below the middle of the path of the slide block. The link, 29, serves as a means for guiding the lower 'end of the rocking member for substantially upright movement.

An approximately horizontal link, 32, has its forward end coupled to the upper end of the rocking member, 26, by means of a bolt,

'33, the link, 32, being forked and extending to each side of the rocking member. The rear end of said link, 32, is coupled to an arm, 34, which is rigid on a "ock shaft, 35, which is supported in bearings, 36. On sald rock shaft is an arm, 37, to which is coupled a rod, 38, which is in turn coupled to the ordinary reversing lezer, 39, working on a sector or quadrant, 40.

\Vhen the eversing lever is thrown forward and backward, the upper end of the rocking: member, 26, is correspondingly moved; but the lower end of said rocking n ember is by the link, 29, substantially held against forward and backward movement and to a slight up-and-down movement. As above stated, the XOClilHf" member is supported by the bolt, 27, which is carried by the slide block, and said slide block is confined to a horizonta path. Vi'h n the slide block and the rocking member are on the center, the rocking member is in the uprightposition and its upper end and the supporting bolt, 33, are at their highest point above the slide block path. When said members air moved away from the center, in either direction, the portion of the rocking member above the bolt or pintle, 27, becomes more and more inclined, whereby the upper end of receiving the end of the auxiliary rod and the upper portion extending along each side of the bridge and being coupled to the outer ends of the horizontal arm, 17, of the bellcrank, F. The upright arm, 18, of said bellcrank is coupled to the valve stem 1,

An upright link, 42, is located rearward of the upright link, 41, and has its lower end forked and extending to each side of the auxiliary rod and being coupled thereto by means of a'horizontal bolt, 43, which is in an upright line cutting the middle of the path of the slide block when the auxiliary crank is on the upper quarter or on the lower quarter. The upper portion of the link, 42, is also forked and extends along opposite sides of the fo'ked rocking member, 26, and has its upper end coupled to the upper end of said forked member and the link, 32, the bolt, 33, extending horizontally through the link, 32, the rocking member, 26, and the upright link, 42. Said bolt, 33, constitutes a part of the reversing mechanism and is a support movable in an'arc of which the bolt, 43, is an axis. The length of the upright link, 42, is such as to bring the bolt, 43, approximately to the height of the driver axis when said link is in the upright position. In whatever position in its arch path the bolt, 33, maybe, said bolt forms a support and fulcrum for said link, 42. The lower end of said link supports the bolt, 43, and said bolt forms a fulcrum for the auxiliary rod during the up-and-down movements of the rear end of the latter. To permit the forward and backward movement of the auxiliary rod, the link, 42, swings with the bolt, 33, as an axis. The up-and-down movements of the rear end of the auxiliary rod cause inverse up-and-down movement of the forward end of said rod, whereby the up right link, 41, is carried up and down, and

member, F, and the.

as described in my patents to which reference has been made. I

In the form shown by Figs. 8 and 9, the brackets, 28, and the link, 29, are omitted and a bracket, 44, is secured to the lower face of the bridge, B, by means of bolts, In said bracket is an upright slot, 46,.in which is a slide-block, 47. The bolt, 31, BX- .tends horizontally through the lower end of the rocking member, 26, and the slide block, Said slide block allows said bolt to move up and down and holds it against horizontal movement.

The plates, 22 and 23, seated on the bridge, B, form a path or slideway for the rocking member, 26, which rocks while it is sliding on said way, whereby its upper end is carried through an are which has its axis or center at approximately the lever of the driver axis.

The construction allows an accurate adjustment of the slideway. The bolts, 21, are movable horizontally in the larger holes, 20, in the bridge, B. This permits a. slight horizontal shifting of the bars or plates, .22 and 23, in any direction. After loosening said bolt, fillers may be placed beneath the plate, 22..

The bridge and the slideway plates, 2:2 and 23, are straight and, for that reason, easily manufactured.

I claim as my ii'ivention,

1. In a locomotive valve gear, a reversing mechanism comprising means forming a horizontal slideway, a rocking member slidablv supported between its ends on said slideway and being in operative relation with the reversing lever, means for guiding the lower end of said rocking memberfor substantially upright movement, and valve actuating means in operative relation with the upper portion of said rocking member, substantially as described.

2. In a locomotive valve gear, the combination of means forming a horizontal slideway, a rocking member slidably supported between its ends on said slideway and being in operative relation with the re versing lever, means for guiding the lower end of said rocking member for substantially upright movement, an approximately upright link, having its upper end coupled to the upper end of said rocking member, an auxiliary rod coupled to said link and in operative relation with the distributing valve, and means for actuating the auxiliary rod, substantially as described.

3. In a locomotive valve gear, the combination of means forming a horizontal slideway, arocking member slidably supported between its ends upon said slide'way and be ng in operative relation with the reversin lever, means for guiding the lower end 0 said rocking member for SllllStilll- 5 tially upr ght movement, a drive wheel, an

auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having'its upper end coupled to the upper end of .said rocking member. and the other having its upper end in relation with the distributing valve, substantially as described.

4. In a locomotive valve gear, the combination of a bell-crank in operative relation with the distributing valve, means torming a horizontal slideway, a rocking member slidably supported between its ends upon said slideway and being in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially upright movement, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with said bell-crank, substantially as described.

5. In a locomotive valve gear, the .combination of a bridge, a rocking member slidably supported between its ends upon said bridge and being in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially upright movement, a drive wheel,

an auxiliary crank on said drive wheel. an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with the distributing valve, substantially as described.

6. In a locomotive valve gear, the combination of a bell-crank in operative relation with the distributing valve, a bridge, a rocking member slidably supported between its ends upon said bridge and being in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially upright movement. a drive wheel, an auxiliary.- crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled' to the upper end of said rocking member and the other having its upper end in operative relation with the bell-crank, substantially as described.

7. In a locomotive valve gear. the combination of means forming a horizontal slideway, a forked rocking nieml r extending to each side of said slideway and slidably supported between its ends upon said slideoperative I way and being in operative relation with the reversing lever, means for guiding the lower endof said rocking member for substantially upright movement, a drive wheel, an auxil- 5 iary crank on said drive wheel, an auxiliary rod coupled to said crank, and 'two approximately upright links each having its lower end coupled to the auxiliary rod and one havlng its upper end coupled to the upper end of said rocking member and the other havin its upper end in operative relation with the distributing valve, substantially as described.

"8. In a locomotive valve gear, the combination of a bell-crank in operative relation with the distributing valve, means forming a horizontal slideway, a forked rocking member extending along each side of said slide- Way and slidably supported between its ends.

on said slideway and being in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially upright movement, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with said bell-crank, substantially as described.

9. In a locomotive valve gear, the combination of a bridge, a forked member extending along opposite sides of said bridge and slidably supported between its ends upon said bridge and having one end extending upward and being in operative relation with ilhe reversing lever, means for substantially holding the other end of said rocking member against horizontal movement, a drive wheel, an auxiliary crank on said drive wheel. an auxiliary rod coupled to said crank, and two approximately upright links eacli having its lower end coupled to the auxiliary rod and one having its upper end coupl d to the upper end of said rocking UH'Hhi' and the other having its upper end in operative relation with the distributing valve. substantially as described.

10.In a locomotive valve gear, the combination of a bell-crank in operative relation with the distributing valve, a bridge, a forked rocking memberextending along both sides of said bridge and slidably supported between its ends upon said bridge and being in perative relation with the reversing le ver. means for guiding the lower end of said #1 rking member for substantially upright movement, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary .rod coui d to said crank, and two approximate u right links each having its lower end cou led to the auxiliary rod and one havin its upper end cou led to the upper end OI said rocking member and the other having its upper endin operative relation with the bell-crank, substantially as described.

11. In a locomotive valve gear, the combination of means forming a horizontal slideway, a horizontal link hinged by one end and having its other end extendin into an upright line cutting the middle of said slideway, a rocking member slidably supported between its ends upon said slideway and being in operative relation with the reversing lever and having its lower end coupled to said link, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with the distributing valve, substantially as described.

12. In a locomotive valve gear, the combination of a bell-crank in operative relation with the distributing valve, means forming a horizontal slideway, a horizontal link hinged at one end and having its other end extending into an upright line cutting the middle of said slideway, a rocking member slidably supported between its ends upon said slideway and being in operative relation with the reversing lever and having its lower end coupled to the free end of said link, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one hav ing its upper end coupled. to the upper end of said rocking member and the other having its upper end in operative relation with said bell-crank, substantially as described.

13. In a locomotive valve gear, th combination of a bridge on which is a slide-path, a horizontal link hinged by one end and having its other end extending into an upright line cutting the middle of the slidepath, a rocking member slidably supported between its ends upon said bridge and being in operative relation with the reversing 1ever and having its lower end coupled to the free end of said link, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with the distributing valve, substantially as described.

14. In a locomotive valve gear, the combination of a bell-crank in operative relation with the distrilmting valve, a bridge on which is a slide-path, a horizontal link hinged by one end. and having its other end extending into an upright line cutting the middle of said slide-path, a rocking member slidably supported between its ends in said slide-path and being in operative relation with the reversing lever and having its lower end coupled to the free end of said link, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said, rocking member and the other having its upper end in operative relation with the bell-crank, substantially as described.

15. In a locomotive valve gear, the combination of adjustable means forming a hori-" zontal slideway. a rocking member slidably supported between its ends upon said slideway and being in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially upright movement, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with the distributing valve, substantiallv as described.

'18. In a locomotive valve gear. the combination of a bell-crank in operative relation with the distributing valve. adjustable means forming a horizontal slidewa y, a rocking member slidably supported between the ends noon said slideway and being in operative relation with the reversing lever. means for guiding the lower end of said. rocking member for substantially upright movement. a. drive wheel, an auxiliary crank on said drive wheel. an auxiliary rod coupled to said crank. and two approximately upright links ea h having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking u ember and the other having its upper end in operative relation with said bellerank. substantially as described.

17. l n a locomotive valve gear. the combination of an adjustable, horizontal slideway bar. a rocking member slidablv supported between its ends upon said slideway and being in operative relation with the reversing: lv' rl. means for guiding the lower end of s id rocking member for substantially up- Tifil movement, a drive wheel, an auxiliary said drive wheel, an auxiliary rod to said crank, and two approxibetween its ends upon said slideway and being in operative relation with the reversmg lever, means for guiding the lower end of sald rocking member for substantially horizontal movement, a drive wheel, an auxiliary crankbn'said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with the distributing valve, substantially as described.

19. In a locomotive valve gear, the combination of two slideway bars, adjustable means for securing said bars, a rocking member slidably supported between its ends upon said slideway and being in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially upright movement, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with the distributing valve. substantially as described.

20. In a locomotive valve gear, the combination of two horizontal bars forming a slideway. means adjustably s curing said bars, a rocking member slidablv supported between its ends upon said slideway and being in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially upright movement, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with the distributing valve, substantially as described.

21. In a locomotive valve gear, the combination of two bars having sliding extensions and forming a horizontal slideway, a rocking member slidably supported between its valve, substantially as described.

22. In a locomotive valve gear, the combination of two superposed bars forming a horizontal slideway, upright bolts extending through said bars, and a'rocking member slidably supported between its ends upon said slidewayland being in operative relation with the reversing lever, means for guiding the lower-end of said rocking memher for substantially upright movement, a drive whee], an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with the distributing valve, substantially as described.

23. In a locomotive valve gear, a reversing mechanism comprising means forming a horizontal slideway, a slide block on said slideway, a rocking member supported between its ends on said slide block and being in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially upright movement. and valve actuating means in operative relation with the upper portion of said rocking member, substantially as described.

24. In a locomotive valve gear, the combination of means forming a horizontal slideway, a slide block on said slideway, a rocking member supported between its ends on said slide block and being' in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially upright movement, an

approximately upright link having its upper end coupled to the upper end of said rocking member, an auxiliary rod coupled to said .bination of means .60

link and being in operative relation with the distributing valve, and means for actuating the auxiliary rod. substantially as described.

25. In a locomotive valve. gear, the comforming a horizontal slideway, a slide block on said slideway, a rocking member supported between its ends on said slide block and being in operative relation with the reversing lever, means for guiding the lower end of said rocking memdrive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with the distributing valve, substantially as described.

26. In a locomotive valve gear, the combination of a bell-crank in operative relation with the distributing valve, means forming a horizontal slideway, a slide block on said slideway, a rocking member supported between its ends on said slide block and being in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially upright movement, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with said bell-crank, substantially as described.

27. In a locomotive valve gear, the combination of a bridge, a slide block upon said bridge, a rocking member supported between its ends on said slide block and being in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially up right movement, a drive wheel, an auxiliary crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the upper end of said rocking member and the other having its upper end in operative relation with the distributing valve, substantially as described.

28. In a locomotive valve gear, the combination of a bridge, bars seated upon said bridge and forming a slideway between them and having their side faces flush with the side faces of the bridge, a slide block located between said bars and having its side faces flush with the side faces of said bars, a forked rocking member extending along each side of said bars, slide block, and bridge and being fulcrumed to said slide block and being in operative relation with the reversing lever, means for guiding the lower end of said rocking member for substantially upright movement, a drive wheel, an auxiliaiy crank on said drive wheel, an auxiliary rod coupled to said crank, and two approximately upright links each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the I day of May, in the year one thouand nine upper end of said rocking member and the hundred and fourteen. other huviuq' its upper end in operative 1e1a. v T tion with the distributing valve, substan- ILLIAM SHERMAN tially as describe-1i. Witnesses:

In testimony whereof I. have signed my CYRUS KEHR,

name, in presence of two witnesses, this 18th S. E. Honons 

